Device for producing imitation gems



May 16, 1933. G. MAIE R DEVICE FOR PRODUCING IMITATION GEMS Filed Dec. 9, 1931 INVENTOR. flii'l dl Y B M A TTORN E YS.

Patented Ma 16,1933 i 1,908,774 .p

- UNITED STATES PATENT oFF ca GUSTAV HAIER, OF PFORZHEIM, GERMANY DEVICE roa-raonucme riarmrron ems Application'flled December 9 1981. Serial No. 579,953.

This invention relates to the production vided with a flat top instead of a com leof imitation gems, more particularly marmentary surface conforming to the hol ow casite stones, and has for its object to-prodie. vide an imitation stone having sharp edges Fig. 7 is a sectional view through the tool 6 and faceted surfaces of a high polish to give or body of the hollow or upper die for a deep brilliancy and more closely resemble forming the gems. natural stones. Fig. 8 is a section on line 8-8 of Fig. .7.

Another object of this invention is the Fig. 9 is a side elevation of one of the provision of a tool which may provide sharp sections. I 10 edges for the faceted surfaces of the gems Fig. 10 is a view looking at the face of with each of said surfaces highly polished. one of the sections, as indicated by the line A further objectof the invention is the 1010 of Fig. 9. provision of construction by which thecost It is common in the provision of imita of labor in producing marcasite stones will tion marcasite stones to emboss a section by ll be materially reduced by eliminating the means of hollow die with'the approximate necessity of hand touching up the surfaces shape of the marcasite stones and to then i of the stones Which are formed by dies heretouch 7 up each of the surfaces by hand to tofore used. bright-cut the facets to give a high olish With these and other objects in view, the thereto and sharpen the edges to e ect a 20 invention consists of certain novel features deeper brilliancy in imitation stones. This of construction, as will. be more fully deoperation is expensive and by the invention scribed, and particularly pointed out in the which is herein disclosed, I eliminate this ap ended claims. disadvantage.

ig. 1 is a top plan view of a series of p In the old form of hollow die of solid con- 25 imitation gem settings with imitation gems struction it has not been possible to polish provided therein. each of the faceted surfaces formed and ob- Fig. 2 is a top plan view of one step in the tain sharp edges as any polishing rounded process of forming these imitation stones, these edges to an appreciable extent, and in showing the rounded raised surface upon order that a hollow die may be formed in 30 which the faceted surfaces'are impressed. which the surfaces may be highly polished Fig. 3 is a view similar to Fig. 2 and and yet sharp edges provided,Ihave formed showing the faceted surfaces impressed a die in sections, with the number of sections ther in, equal to the facets desired so that there is Fig. 4 is a side elevation of a piece of a section for each facet and a surface is 35 sheet stock embossed to provide domed or provided on each section which may be highcurved surfaces which may be one step in 1y polished, so that these sections When asthe process of forming these imitation gems. sembled and held together provide a com- Fig. 5 is a view similar to Fig. 4, showing plete hollow die with highly polished surthe raised surfaces as being ressed to form faces and sharp edges, forming a perfect 40 the faceted surfaces desire and the dies negative'of the shape of the gem such as a used. marcasite stone, and thus it is possible to Fig. 6 shows a view similar to Figs. 4 and remove the sections from time to time to 5 but modified from Figs. 4 and 5 in that highly polish each facet forming surface, the curved raised surfaces are solid instead (as for instance on a glass plate); and-the 45 of hollow, and the supporting die is prov following is a detailed description of the present embodiment of this invention illustrating the preferred means by which these advantageous results may be accomplished.

With reference to the drawing, desig-- nates the body of the die which is provided with a conical opening 16 in its front or outer end and a threaded cylindrical opening at 'its opposite or inner end. The die is formed from a plurality of sections 18 here shown as six in number, and each is'of a sector shape having an area one-sixth of the area of the cross-section of the die. The

outer surface 19 "of the die is conical in form to fit the conical surface 16; in the body I 15, while a member 20 is provided in the openin in the body through which pressure is app ied to the sections by means of a threaded membcr2l having, a slot 22 for turning for the application of pressure on the die, thus forcing the sections of the die outwardly and at the same time into close Circumferential relationship by reason of the taper.

The die is hollow as at 23 at one end to provide the negative of the faceted surfaces desired, here shown as six. A surface in a single plane as indicated at 25 is provided on each section 18 and may thus be. highly polished upon any abrasive surface or a glasslate to obtain the polish desired and provi e sharp edges, thus when the six sections, each highly polished are assembled their contacting edges form sharp angles form and is embossed or domed as at 27 by a pair of dies 28 and 29 of a suitable shape. If formed in this shape the hollow die 23 is forced into engagement with the convex surface of this dome, while the same is supported from below by a support die 30 -to impress the shape of the hollow die on this surface which will be highly polished and provided with sharp edges due to the shape .of the hollow die which is impressed thereon,

thus forming a gem or marcasite stone 31.

In some instances the raised portion 32 is provided solid and struck up from the work 33, and in such instances the upper hollow die is forced into engagement with the solid portion which is supported from below by a block 34, having a plain surface 35 there- I find by the use of a tool of this char? acter that small sectionsmay be embossed to form imitation ma-rcasite stones with sharp corners and of a high polish eliminating the necessity of hand touching of the gems, and

yet a gem is provided-which is of great brilliance and a gem of a suprisingly sparkling.

effect is obtained from the faceted surfaces.

The foregoing description is directed solely towards the construction illustrated, but I desire it to be understood that I reserve the privilege of resorting to all the mechanical changes to which the device is susceptible, the'invention being defined and limited only by the terms of the appended claims.

I claim:

1. A tool for forming faceted surfaces comprising a body, a die mounted therein composed of a plurality of sections, each section provided with a surface in a single plane and cooperating with thesurfaces of the other sections to form the negative of the faceted surface desired.

2. A tool for forming'faceted surfaces comprising a body, a die mounted therein composed of a plurality of sections, each section provided with one faceted surface and cooperating with the surfaces of the other sections to form the negative of the faceted surface desired.

3. A tool for forming an impressed design comprising a body, a die mounted therein composed of a plurality of sections,

each section provided with a ortion of the design desired and cooperating with the surfaces of the other sections to form the negative of the complete design desired, and means for maintaining said sections rigidly in position at all times.

4. A tool for forming faceted surfaces comprising a body, a die mounted therein composed of a plurality of sections, each section carrying a surface in a single lane 'and cooperating with the surfaces 0 the other sections to form the ne ative of the faceted surface desired, each 0 said faceted surfaces being highly polished.

5. A tool for making faceted surfaces comprising a body having a conical opening in the front end of the body and a threaded openin forme of aplurality of sections and together fitting said jconical opening, and means including a threaded member engaging said threaded o ening for forcing the die sections outwar ly along said conical surface whereby they tightly contact one with another.

6. A tool for making faceted surfaces comprising a body having a conical openin in the front end of the body and a threade opening at its opposite end, a hollow die formed of a plurality of sections and together fitting said conical opening, and means including a threaded member engaging said threaded opening for forcing the at its opposite end, a hollow die with another, each of said sections being provided with a faceted surface and all of said sections together constituting a faceted hollow die. 7. A tool for making faceted surfaces comprising a body having a conical opening in the front end of the body and a threaded opening at its opposite end, a hollow die formed of a plurality of sections and together fitting said conical opening, and

means including a threaded member engaging said threaded opening for forcing the die sections outwardly along said conical surface whereby they tightly contact one with another, each of said sections being provided with a faceted surface and all of said sections together constitutin a faceted hollow die, and each of said sur aces being highly polished. In testimony whereof I afiix my signature.

GUSTAV MAIER. 

